South Africa's Chad le Clos reacts as he wins gold in the men's 200-meter butterfly swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Tuesday, July 31, 2012. (AP Photo/Michael Sohn) less

South Africa's Chad le Clos reacts as he wins gold in the men's 200-meter butterfly swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Tuesday, July 31, 2012. ... more

United States' Michael Phelps waits to receive his silver medal for the men's 200-meter butterfly swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Tuesday, July 31, 2012. (AP Photo/Daniel Ochoa De Olza) less

United States' Michael Phelps waits to receive his silver medal for the men's 200-meter butterfly swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Tuesday, ... more

Russian gymnasts and team officials react as teammate Kseniia Afanaseva falls while performing on the floor during the Artistic Gymnastics women's team final at the 2012 Summer Olympics, Tuesday, July 31, 2012, in London. (AP Photo/Matt Dunham) less

Russian gymnasts and team officials react as teammate Kseniia Afanaseva falls while performing on the floor during the Artistic Gymnastics women's team final at the 2012 Summer Olympics, Tuesday, July 31, 2012, ... more

Feet get tangled during a match between Yoshie Ueno of Japan and Marijana Miskovic of Croatia in the women's 63-kg judo competition at the 2012 Summer Olympics, Tuesday, July 31, 2012, in London. (AP Photo/Paul Sancya) less

Feet get tangled during a match between Yoshie Ueno of Japan and Marijana Miskovic of Croatia in the women's 63-kg judo competition at the 2012 Summer Olympics, Tuesday, July 31, 2012, in London. (AP Photo/Paul ... more

Photo: Paul Sancya, Associated Press

Feet get tangled during a match between Yoshie Ueno of Japan and... Photo-3264190.46799 - SFGate

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Two Chinese fans pause for photos prior to the Women's Synchronized 10 Meter Platform Diving final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics, London, Tuesday, July 31, 2012. (AP Photo/Jae C. Hong) less

Two Chinese fans pause for photos prior to the Women's Synchronized 10 Meter Platform Diving final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics, London, Tuesday, July 31, 2012. (AP ... more

Photo: Jae C. Hong, Associated Press

Two Chinese fans pause for photos prior to the Women's... Photo-3264191.46799 - SFGate

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LONDON, ENGLAND - JULY 31: Dimitrij Ovtcharov of Germany celebrates winning the Men's Singles Table Tennis quarter-final match against Michael Maze of Denmark on Day 4 of the London 2012 Olympic Games at ExCeL on July 31, 2012 in London, England. (Photo by Feng Li/Getty Images) less

LONDON, ENGLAND - JULY 31: Dimitrij Ovtcharov of Germany celebrates winning the Men's Singles Table Tennis quarter-final match against Michael Maze of Denmark on Day 4 of the London 2012 Olympic Games at ExCeL ... more

US swimmers Ryan Lochte, Conor Dwyer, Ricky Berens and Michael Phelps react after they won gold in the men's 4x200m freestyle relay final during the swimming event at the London 2012 Olympic Games on July 31, 2012 in London. AFP PHOTO / LEON NEALLEON NEAL/AFP/GettyImages less

US swimmers Ryan Lochte, Conor Dwyer, Ricky Berens and Michael Phelps react after they won gold in the men's 4x200m freestyle relay final during the swimming event at the London 2012 Olympic Games on July 31, ... more

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Serbia's Novak Djocovic returns the ball to Andy Roddick of the US during their men's single tennis match second round for The London 2012 Olympic Games at Wimbledon in London on July 31, 2012. AFP PHOTO/Luis ACOSTALUIS ACOSTA/AFP/GettyImages less

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Serbia's Novak Djocovic returns the ball to Andy Roddick of the US during their men's single tennis match second round for The London 2012 Olympic Games at Wimbledon in London on July 31, 2012. AFP ... more

LONDON, ENGLAND - JULY 31: Qingfeng Lin of China competes during the Men's 69kg Weightlifting Final on Day 4 of the London 2012 Olympic Games at ExCeL on July 31, 2012 in London, England. (Photo by Laurence Griffiths/Getty Images) less

LONDON, ENGLAND - JULY 31: Qingfeng Lin of China competes during the Men's 69kg Weightlifting Final on Day 4 of the London 2012 Olympic Games at ExCeL on July 31, 2012 in London, England. (Photo by Laurence ... more

Venus Williams of the United States screams during her match against Aleksandra Wozniak of Canada at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Tuesday, July 31, 2012. (AP Photo/Elise Amendola) less

Venus Williams of the United States screams during her match against Aleksandra Wozniak of Canada at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Tuesday, July 31, 2012. ... more

Photo: Elise Amendola, Associated Press

Venus Williams of the United States screams during her match... Photo-3264193.46799 - SFGate

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U.S. gymnasts U.S. gymnast McKayla Maroney, Kyla Ross, Alexandra Raisman, Gabrielle Douglas and Jordyn Wieber bite their gold medals at the Artistic Gymnastics women's team final at the 2012 Summer Olympics, Tuesday, July 31, 2012, in London. (AP Photo/Matt Dunham) less

U.S. gymnasts U.S. gymnast McKayla Maroney, Kyla Ross, Alexandra Raisman, Gabrielle Douglas and Jordyn Wieber bite their gold medals at the Artistic Gymnastics women's team final at the 2012 Summer Olympics, ... more

LONDON, ENGLAND - JULY 31: Lebron James #6 of United States looks on prior to the game against Tunisia during the Men's Basketball Preliminary Round match on Day 4 of the London 2012 Olympic Games at Basketball Arena on July 31, 2012 in London, England. (Photo by Christian Petersen/Getty Images) less

LONDON, ENGLAND - JULY 31: Lebron James #6 of United States looks on prior to the game against Tunisia during the Men's Basketball Preliminary Round match on Day 4 of the London 2012 Olympic Games at ... more

Photo: Christian Petersen, Getty Images

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France's rightwing Luc Abalo reacts after falling on the floor during the men's preliminaries Group B handball match Argentina vs France for the London 2012 Olympics Games on July 31, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANOJAVIER SORIANO/AFP/GettyImages less

France's rightwing Luc Abalo reacts after falling on the floor during the men's preliminaries Group B handball match Argentina vs France for the London 2012 Olympics Games on July 31, 2012 at the Copper Box ... more

A supporter of Lithuania reacts during the team's basketball game against Nigeria at the 2012 Summer Olympics on Tuesday, July 31, 2012, in London. (AP Photo/Emilio Morenatti)

A supporter of Lithuania reacts during the team's basketball game against Nigeria at the 2012 Summer Olympics on Tuesday, July 31, 2012, in London. (AP Photo/Emilio Morenatti)

Photo: Emilio Morenatti, Associated Press

A supporter of Lithuania reacts during the team's basketball... Photo-3263956.46799 - SFGate

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Debbie Phelps (R) and Hiraly (C) mother and sister of US swimmer Micheal Phelps, applaud next to Israel's model Bar Refaeli (2L,up) and US surfeur Shaun White (C,up) during the podium ceremony of the men's 4x200m freestyle relay final during the swimming event at the London 2012 Olympic Games on July 31, 2012 in London. AFP PHOTO / CHRISTOPHE SIMONCHRISTOPHE SIMON/AFP/GettyImages less

Debbie Phelps (R) and Hiraly (C) mother and sister of US swimmer Micheal Phelps, applaud next to Israel's model Bar Refaeli (2L,up) and US surfeur Shaun White (C,up) during the podium ceremony of the men's ... more

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United States' Travis Stevens adjusts his bandage as he competes with Germany's Ole Bischof (blue) during their men's -81kg judo contest semi-final match of the London 2012 Olympic Games on July 31, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFEFRANCK FIFE/AFP/GettyImages less

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United States' Travis Stevens adjusts his bandage as he competes with Germany's Ole Bischof (blue) during their men's -81kg judo contest semi-final match of the London 2012 Olympic Games on July 31, ... more

USâ€™ Ryan Lochte cheers after winning the men's 4x200m freestyle relay final during the swimming event at the London 2012 Olympic Games on July 31, 2012 in London. AFP PHOTO / CHRISTOPHE SIMONCHRISTOPHE SIMON/AFP/GettyImages less

USâ€™ Ryan Lochte cheers after winning the men's 4x200m freestyle relay final during the swimming event at the London 2012 Olympic Games on July 31, 2012 in London. AFP PHOTO / CHRISTOPHE SIMONCHRISTOPHE ... more

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Brazil's Cesar Cielo dives as he competes in the men's 100m freestyle heats during the swimming event at the London 2012 Olympic Games on July 31, 2012 in London. AFP PHOTO / MARTIN BUREAUMARTIN BUREAU/AFP/GettyImages less

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Brazil's Cesar Cielo dives as he competes in the men's 100m freestyle heats during the swimming event at the London 2012 Olympic Games on July 31, 2012 in London. AFP PHOTO / MARTIN BUREAUMARTIN ... more

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Britain's gymnast Hannah Whelan performs on the beam during the women's team final of the artistic gymnastics event of the London Olympic Games on July 31, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEXTHOMAS COEX/AFP/GettyImages less

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Britain's gymnast Hannah Whelan performs on the beam during the women's team final of the artistic gymnastics event of the London Olympic Games on July 31, 2012 at the 02 North Greenwich Arena in ... more

Denmark's Christinna Pedersen, left, and Kamilla Rytter Juhl celebrate after winning the first game of the women's doubles badminton match against Tian Qing and Zhao Yunlei of China, at the 2012 Summer Olympics, Tuesday, July 31, 2012, in London. (AP Photo/Andres Leighton) less

Denmark's Christinna Pedersen, left, and Kamilla Rytter Juhl celebrate after winning the first game of the women's doubles badminton match against Tian Qing and Zhao Yunlei of China, at the 2012 Summer ... more

Miles Chamley-Watson of the United States wore his flag's emblem on his mask against Egypt's Alaaeldin Abouelkassem in the round of 32 in the men's foil individual competition at the ExCel centre during the 2012 Summer Olympic Games in London, England, Tuesday, July 31, 2012. (David Eulitt/Kansas City Star/MCT) less

Miles Chamley-Watson of the United States wore his flag's emblem on his mask against Egypt's Alaaeldin Abouelkassem in the round of 32 in the men's foil individual competition at the ExCel centre during the ... more

Photo: David Eulitt, McClatchy-Tribune News Service

Miles Chamley-Watson of the United States wore his flag's... Photo-3264386.46799 - SFGate

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Indonesia's Triyatno Triyatno celebrates after winning the silver medal during the men's 69kg group A weightlifting event, at The Excel Centre in London on July 31, 2012, during the London 2012 Olympic Games. AFP PHOTO / YURI CORTEZYURI CORTEZ/AFP/GettyImages less

Indonesia's Triyatno Triyatno celebrates after winning the silver medal during the men's 69kg group A weightlifting event, at The Excel Centre in London on July 31, 2012, during the London 2012 Olympic Games. ... more

Teammates Marie Mavers (L) and Julia Mueller celebrate with Katharina Otte of Germany after scoring a goal against Australia during their London 2012 Olympic Games preliminary round women's field hockey match at the Riverbank Arena in London on July 31, 2012. AFP PHOTO/ INDRANIL MUKHERJEEINDRANIL MUKHERJEE/AFP/GettyImages less

Teammates Marie Mavers (L) and Julia Mueller celebrate with Katharina Otte of Germany after scoring a goal against Australia during their London 2012 Olympic Games preliminary round women's field hockey match ... more